Frank e



(No Model.)

F. E. KEEFE.

OIL BURNER.

' No. 541,168. Patented June 18, 1895.

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UNITED STATES PATENT OFFICE.

FRANK E. KEEFE, OF CHICAGO, ILLINOIS, ASSIGNOR OF TWO-THIRDS TO CHARLESK. MORTON AND FREDERICK W. PARKS, OF SAME PLACE.

OIL-BURNER.

SPECIFICATION forming part of Letters Patent No. 541,168, dated June 18,1895.

Application filed November 28,1893 Serial No, 492,230. (No model.)

To all whom it may concern.-

Be it known that I, FRANK E. KEEFE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Im provement in Oil-Burners, (Case No.1,) of which the following is a full, clear, concise, and exactdescription, reference being had to the accompanying drawings, forming apart of this specification.

My invention relates to oil burners, and the object thereof isto providea burner wherein shall be combined durability, cheapness and efficiencyof operation, and which may be easily kept in order and readilyrepaired.

In oil burners of the class to which my invention relates, steam, air,and oil are conducted by separate ducts into a common mixing chamber,provided at one end with a nozzle from which the mixed steam, air andoil emerge. The steam serves to impart velocity to the oil, separatingit into a fine spray so that it may more readily and completely combinewith the gases of the steam and admitted air; and, further serves toraise the temperature of the mixture. The jet of mixed steam, air andoil thus issuing from the nozzle furnishes an intense flame whenignited, the carbon of the oil uniting combustively with the gases ofthe steam and air.

My invention contemplates the improve? ment of burners of the abovedescribed class by simplifying the construction thereof, the oil ductsbeing formed in the walls of the main casting instead of being mountedthere- -on, while the steam duct and the air ports which are arrangedaround the steam duct so that the air will be heated in its passage tothe flame, are mounted upon a cap adapted to be screwed upon the maincasting, the whole construction being thus one of extreme simplicity,with nothing to get out of order and with all parts arranged in the mostadvantageous positions.

I will describe my invention in connection with the accompanyingdrawings, in which- Figure l is a sectional view of an oil-burnerembodying my invention. Fig. 2 is an end View of such a burner, showingthe air-ports partially closed.

positions.

Like letters refer to like parts in the several figures.

threads to facilitate connection with an oil reservoir. Said opening acommunicates with an oblique duct a the outer .end of which is closed bya nut a The forward end of the casting a is provided with properlyformed screw threads whereby a nozzle piece b may be secured thereto. Acap 0 is adapted to be screwed upon the rear end of said casting, saidcap carrying at its center the steam duct 0' which extends within thecasting a when the several parts are assembled to a point near the exitend of the oil duct. The bore of the steam duct is convergent toward itsexit end whereby the velocity of the steam may be increased The externalend of the steam duct I is provided with screw threads, whereby conwitha source of steam supply. Said cap 0 is also provided with air ports 0 cpreferably formed in arc shape and occupying diametral A valve plate (1rotatable about a central axis and provided with openings adapted toregister with the ports 0 c in one position of the valve plate,furnishes a means for regulating the amount of admitted air.

The valve plate d is preferably mounted to rotate about a portion of thesteam duct as a journal, a nut 6 being provided adapted to screw againsta collar thereon to maintain the valve plate in position whilepermitting rotation. The nozzle end of the burner as thus assembled ismade convergent whereby the jet may be contracted and its velocityincreased, the walls then diverging at the extreme end to permitexpansion of the jet, and to prevent the formation of vortice s.

It will be understood that valves are provided in the pipes leading tothe oil reservoir and steam supply, respectively, whereby the admittedamount of oil and steam may be re,,- ulated.

The nozzle is preferably made separable so that its internal convergentsurface may be turned up smooth, as when rough eddy ourwhichthe oil ductis to be bored, may be started accu ately at the proper point.

Having described the constructional features of a burner embodying myinvention, I

will now explain the operation thereof. The

oil and steam valves having been opened to the desired extent, and thevalve plate d rotated to present the desired area of air ad-- mission,steam 'emerges from the end of the steam duct passing from the mixingchamber through the nozzle. The suction produced by the flow of thesteam draws air through the ports 0 0 The air thus admitted into themixing chanibercomes firstin heat conductive contact with the walls ofthe steam duct, its temperature being thereby raised. The column ofmoving air thus produced encircles the steam duct and upon reaching theexit end of the steam duct mingles with the jet of steam from all sides,a thorough mixture of the steam and air being thus insured. Oil from theoil reservoir passing by the oblique oil duct is directed upon the jetof mixed the carbon of the steam and of the air. heat of the flame thuscontinuously fed may steam and air,'and beingscattered throughout themixture, issues in connection with the air and steam from the nozzle.The issuing jet comes in contact with the flame and combustion ensues,the carbon of the oil uniting with 40 The be varied by altering thesupply of oil, air, or by altering all together.

Many'modifications of the above described device will suggest themselvesto those skilled in the art, and I do not wish, therefore, to limitmyself to constructional details, but

I claim as my invention and desire to secure by Letters Patent--' In anoil burner, the combination with the main casting a, having formed inits upper wall the oblique oil duct a extending through said wall to theexterior thereof, and the oil inlet a communicating with said oil duct,the removable nut or plug a screwed into'the outer end of said oil duct,cap c screwed upon the rear end of said main casting a, said capcarrying a centrally located steam nozzle 0' extending into theinteriorof said casting a, and terminating beneath the outlet end of oilduct a said cap 0 being provided with air inlets situated about saidsteam nozzle, substantially as described.

In witness whereof I hereunto subscribe my name this 24th day ofNovember, A. D. 1893.

FRANK E. KEEFE.

Witnesses:

C. K. MORTON, W. CLYDE J ONES.

